Valves and valve actuation – Tube compressors – Perpendicularly reciprocating tube contacting element
Patent
1992-05-11
1993-06-15
Schwadron, Martin P.
Valves and valve actuation
Tube compressors
Perpendicularly reciprocating tube contacting element
74 8915, 74 8914, 74665C, F16K 3152, F16H 2920
Patent
active
052191460
ABSTRACT:
A squeeze off tool for a flexible pipe includes a vice arrangement involving a first member below the pipe and a second member above the pipe, with a framework guiding the second member for movement toward and away from the first. A power screw has one end rotatably mounted in the second member but cannot move axially with respect to the second member, the power screw having external threads at a location remote from the one end. A locking device selectively restrains rotation of the power screw with respect to the second member. A mechanical advancement mechanism mounted on the framework includes (a) a component defining an internal engaging an external thread on the power screw so that rotation of the power screw when the component is stationary moves the power screw axially, and (b) a worm gear mechanism is provided for rotating the component with respect to the framework, so that rotation of the component when the power screw is restrained against rotation will also move the power screw axially with respect to the component.
REFERENCES:
patent: 4022309 (1977-05-01), Denkowski et al.
patent: 4114474 (1978-09-01), Stratienko
patent: 4715241 (1987-12-01), Lipinski et al.
patent: 5042757 (1991-08-01), Jenkins et al.
Footage Tools
Lee Kevin L.
Schwadron Martin P.
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